public virtual LessNode VisitAtRule(LessParser.AtRuleContext context)
 {
     throw new System.NotImplementedException();
 }
 public override LessNode VisitAtRule(LessParser.AtRuleContext atRule)
 {
     return(atRule.toplevelAtRule()?.Accept(this)
            ?? atRule.nestedAtRule()?.Accept(this));
 }